
ME(w/o STI)-321
Cylinder Block
MECHANICAL
8) Reboring and honing
(1) If any of the cylindricality, out-of-roundness, inner diameter or clearance between cylinder liner and
piston is out of standard or if there is any damage on the cylinder liner, perform reboring (including hon-
ing).
CAUTION:
When any of the cylinder liner needs reboring, all other cylinder liners must be rebored at the same
time, and replaced with proper size pistons.
Oversize piston outer diameter:
0.25 mm (0.0098 in) oversize
Standard
86.225 — 86.245 mm (3.3947 — 3.3955 in)
0.50 mm (0.0197 in) oversize
Standard
86.475 — 86.495 mm (3.4045 — 3.4053 in)
(2) If the inner diameter of cylinder liner exceeds the limit after reboring (including honing), replace the
cylinder block and piston as a set.
NOTE:
• Immediately after reboring (including honing), the inner diameter of cylinder liner may differ from its real di-
ameter due to temperature rise. Thus, when measuring the inner diameter of cylinder liner, wait until the tem-
perature has cooled to 20°C (68°F).
• For the measurement of the inner diameter of cylinder liner, refer to step 7).
Inner diameter of cylinder liner boring limit (diameter):
To 86.505 mm (3.4057 in)
2. PISTON AND PISTON PIN
1) Check the piston and piston pin for wear or crack.
2) Check the snap ring for distortion or wear.
3) Check the piston ring groove for damage.
4) Check the circlip groove (A) for burr.
NOTE:
If the burr is found, remove the burr from groove.
5) Check that the piston pin can be inserted into the piston with a thumb at 20°C (68°F).
ME-06867
(A)
15WRX_STI_US_EN.book 321 ページ 2015年2月13日 金曜日 午前11時20分